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AP28351 ✓ Verified by PartsTable
— · ORING SEAL
WHAT YOU NEED TO KNOW
Material determines chemical compatibility Standard durometer is 70 Shore A
Wrong material = catastrophic seal failure
PRODUCT OVERVIEW

The GASKET is a the manufacturer industrial component. Key specifications include material: PAPER AND GLUE OVERALL, hole_diameter: 0.438 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN, overall_width: 3.625 INCHES NOMINAL IN, overall_length: 4.250 INCHES NOMINAL IN, aperture_diameter: 3.281 INCHES NOMINAL IN, cross-sectional_thickness: 0.016 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-585-0613, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
AP28351
NSN: 5330-00-585-0613
FSC: 5330
CAGE: 5RQL2 — DRS ENVIRONMENTAL SYSTEMS INC (USA)
SPECIFICATIONS
materialPAPER AND GLUE OVERALL
hole_diameter0.438 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
overall_width3.625 INCHES NOMINAL IN
overall_length4.250 INCHES NOMINAL IN
aperture_diameter3.281 INCHES NOMINAL IN
cross-sectional_thickness0.016 INCHES NOMINAL IN
cross-sectional_shape_styleSOLID SINGLE OR COMPOSITION
material_document_and_classificationMIL-G-12803,+3313B MIL SPEC ALL MATERIAL RESPONSES OR MIL-G-12803,+3313C MIL SPEC ALL MATERIAL RESPONSES OVERALL
outside_edge_to_bolt_hole_center_distance_along_width0.500 INCHES NOMINAL IN
outside_edge_to_bolt_hole_center_distance_along_length0.500 INCHES NOMINAL IN
center_to_center_distance_between_bolt_holes_along_width2.625 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
center_to_center_distance_between_bolt_holes_along_length3.250 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
NSN5330-00-585-0613
COMPONENT DIAGRAM
O-RING / SEAL — MATERIAL DETERMINES APPLICATION ID: — CROSS-SECTION CS: — SPECIFICATION Material: — Durometer: — Temp: — PN: AP28351 MFR: OEM ⚠ VERIFY BEFORE ORDERING Wrong material = failure. Viton for oil/fuel, EPDM for water/steam, Buna-N for general purpose, Silicone for food-grade. Chemical incompatibility causes swelling, brittleness, or rapid degradation ✓ BROKER TIP Durometer (hardness) affects sealing pressure tolerance. Higher Shore A = harder = higher pressure. Standard durometer is 70A — verify if application requires different hardness PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CROSS-SECTIONAL SHAPE STYLE: SOLID SINGLE OR COMPOSITION
•
MATERIAL: PAPER AND GLUE OVERALL
•
CROSS-SECTIONAL THICKNESS: 0.016 INCHES NOMINAL IN
•
HOLE DIAMETER: 0.438 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH: 2.625 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-G-12803,+3313B MIL SPEC ALL MATERIAL RESPONSES OR MIL-G-12803,+3313C MIL SPEC ALL MATERIAL RESPONSES OVERALL
•
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH: 0.500 INCHES NOMINAL IN
TECHNICAL CHARACTERISTICS (FLIS)
CROSS-SECTIONAL SHAPE STYLESOLID SINGLE OR COMPOSITION
MATERIALPAPER AND GLUE OVERALL
CROSS-SECTIONAL THICKNESS0.016 INCHES NOMINAL IN
HOLE DIAMETER0.438 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
CENTER TO CENTER DISTANCE BETWEEN BOLT HOLES ALONG WIDTH2.625 INCHES NOMINAL LOCATION NOT OTHERWISE SPECIFIED IN
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-G-12803,+3313B MIL SPEC ALL MATERIAL RESPONSES OR MIL-G-12803,+3313C MIL SPEC ALL MATERIAL RESPONSES OVERALL
OVERALL WIDTH3.625 INCHES NOMINAL IN
OUTSIDE EDGE TO BOLT HOLE CENTER DISTANCE ALONG LENGTH0.500 INCHES NOMINAL IN
OVERALL LENGTH4.250 INCHES NOMINAL IN
APERTURE DIAMETER3.281 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 5
28.351Interchangeable
Drill Set,pivot,jeweler's
interchangeable
36581Interchangeable
Drill Set,pivot,jeweler's
interchangeable
28351Interchangeable
interchangeable cross-reference
interchangeable
T368A224M035ASInterchangeable
interchangeable cross-reference
interchangeable
0283510005Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is AP28351?
AP28351 is a GASKET.
What parts can replace AP28351?
There are 5 known substitutes for AP28351: 28.351, 36581, 28351 and 2 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AP28351?
AP28351 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5330-00-585-0613. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026